Even answers

p. 8

12. 70, 64, 58
14. 65, 86, 111
17. second differences are 5
36. 8.37
38. 1/3
42. 1

p. 15

1. variable: x expression: 5x – 7 equation: 3x + 1 = 6
6. Table values: 9.50, 12, 14.50, 17; Equation: c = 2.5h + 7
20. 12, 21, 30, 39, 48

p. 21

52. 18
64. 30

p. 27

34. III (–6, –9)
40. II (–4, 1)

p. 34

14. First difference is –10; y = 250 – 10x
36. 6 tickets
38. $6.40
44. 4
46. 4

p. 40

4. a) Little to none, since the points are not close to a line of best fit; b) Strong positive since the points are close to a line that is going up from left to right.
6.Strong positive
8. Little to none.

p. 58

24. <
26. >
44. Example answers: a) 7 b) –7 c) 0

p. 65

20. –3
26. 66
32. 0
38. –3.28
44. 2.53
50. –11/20

The Online Number Quiz Solutions

Click here.

p. 58

30. 0
32. –x
52. 3
56. –6

p. 65

56. –1
58. –5
64. 0

p. 71

16. 5
20. -17
24. -199
28. 64
32. 66
36. –58
40. –32.45
44. –3/5
48. 8
50. 5
52. 7
54. 7
56. 5
58. 24
64. a. 1 hour 55 minutes b. 1 hour 53 minutes

p. 78

60. False
62. True
66. a. 15 b. 30

p. 86

24. 9, 9 5400, 720 6120
32. Commutative
34. Distributive
36. Commutative

p. 92

8. 10x – 4
10. 2f – 2g
50. –m + 12r

p. 101

10. –7b +13c – 4
12. 2x^2 + 5
50. a, b
54. 6x^2

p. 119

22. m = –18
28. z = 140
34. y = 1/9
40. j = –5.6
46. m = 5
52. x = –11.5
58. h = –14.4

p. 127

20. x = 8
38. b = -15/4
44. x = 9/8
50. w = -13/2

p. 133

16. c = 22
34. f = 25
46. h = –144

p. 133

42. x = –195

p. 139

14. x = –4
16. x = 7
18. x = –3
20. z = 2
22. x = – 3
24. x = 1
26. h = 3
28. x = –7/5
30. w = 12
32. x = -1/78

p. 145

8. Every number works!!! So, answer is: All real numbers
14. x = –8

p. 145

32. No solution.
38. x = –11
44. x = 15; perimeter = 90

p. 151

8. A = I + P
10. m = y/x
12. b = 5

p. 168

14. Not true.
20. True.
26. 40
32. 785
38. 2.7
44. 48

p. 176

54. 12.5%
86. –3f2 –7

p. 183

20. 0.42

p. 190

50. 17; 18; 17

p. 231

12. –1/3
16. 1/2
26. 9/5
34. undefined
38. 0

p. 249

34. y = 2/3 x
36. y = -3/2x + 4

p. 256

20. 2x – 4y = 0
40. y = 5

p. 256

44. y = 0x + 4; 0x +1y = 4
46. y = 4x + 0; 4x -1y = 0

p. 223

6. D: {1, 2, 3, 4} and R: {1} and Function
8. (3, 9)
10. (21/4, 0)
16. D: {2} and R: {1, 1000} and Not a function
18. (8, 2)
26. (10, 6)

p. 262

24. 4
28. 3
34. –2/5
48. y = 7
52. y = 3x – 4
56. y = 5x + something
58. 0
60. Undefined

p. 240

1. At first, uphill, then downhill, then on level ground
6. $10 per hour
8. k = 1/4 and y =1/4x
10. k = 32
32. 3 miles per hour
34. 5 hours

p. 280

6. b ≤ –12
8. m ≥ 6
10. x ≥ 7
12. x ≥ 20
14. x < 4
32. m < –10
36. x ≥ –1
38. x > –2
44. t ≤ 54
46. t = 78

p. 293

12. –2 ≤ x ≤ 4
16. x > 7/2 or x < 7/3
20. Graph with open circles at 2 and 4 and arrows going both left and right (gap between 2 and 4)
34. –4 < x ≤ 9
36. x < –8 or x ≥ –6
44. –1 – 5y

p. 305

6. x = 7 or x = –3
8. x = 3.4 or x = 2.4
12. 2.4 ≤ x ≤ 3.4
26. x = 2 or x = –22/7
28. 6 < x < 18

p. 329

22. (18, –5)
24. (8, –3)
40. 30

p. 329

10. (7, –9)
12. (–14,19)
14. (1, 3)
16. (1/3, 1/3)
20. (4, 2)

p. 323

4. (1, 3)
12. (0, 0)
28. No
30. Yes

p. 358

14. Carol is 50, Anjie is 16

p. 342

14. no solution; inconsistent
20. (0, 4); consistent & independent

p. 335

14. (–4, 4)
38. (–2, –4)

p. 358

12. 26

p. 335

16. (–4, 4)
32. (4, 8)

p. 358

6. 2/3 mph
8. 8 quarters

p. 476

10. a
12. c
14. c
18. t ≤ –5
22. 2.5 x 10-6
26. 4xy2
28. x10y28

p. 430

12. 10x4 + 3x3 – x2 –11
14. 14x
20. 5x4 + 5x3 + 5x2 –1
50. 16x + 12
52. 6x + 2
60. 7.1 x 106

p. 441

32. x3 + x2y + xy + y2
50. x12/y6
52. y20/x12

p. 450

*I am including answers for both column 1 and column 3.
6. 5b(2c + 1)
8. 4xy(x + 3y – 5)
16. 5(m2 – 7)
18. 4f(f + 1)
22. x2(x7 – 1)
24. 4a4(a4– 5a2 + 2)
28. 4n(n2 – 4n + 2)
30. 2p2r(p2 – 4pr + 8r2)
34. 4x2(x2 – 6)
36. 14r(3 – r2)
40. xn(x3+ 1)
42. x2n+14(xn+7 + 2)
46. (4 + p)(3q – 4)
48. (x – 4)(r + t)
52. (y – 1)(8 – x)
54. (m + 7)(3 – n)